mineral

Green Calcite

Calcium Carbonate (CaCO3)

Hardness: 3 on Mohs scale; Color: Pale to lime green; Luster: Vitreous to waxy/greasy; Crystal Structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Hardness: 3 on Mohs scale
Color: Pale to lime green
Luster: Vitreous to waxy/greasy

Identified April 7, 2026More mineral →

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Physical properties

Hardness: 3 on Mohs scale; Color: Pale to lime green; Luster: Vitreous to waxy/greasy; Crystal Structure: Trigonal/Rhombohedral; Cleavage: Perfect rhombohedral; Specific Gravity: 2.71

Formation & geological history

Formed in sedimentary environments through chemical precipitation from calcium-rich solutions, or as a secondary mineral in igneous hydrothermal veins. It can be found in deposits ranging from ancient Paleozoic formations to more recent geological eras.

Uses & applications

Used primarily as decorative stones, in metaphysical crystal collections, and sometimes as a minor source of lime. In industry, calcite is used in building materials, abrasives, and agricultural soil treatment.

Geological facts

Calcite is unique for its property of double refraction (birefringence); however, in this translucent/waxy form, it is most prized by collectors for its soothing green color which is caused by chlorite or other mineral inclusions during formation.

Field identification & locations

Field identification is traditionally done via the 'acid test'—it will effervesce (fizz) vigorously in contact with dilute hydrochloric acid. It also feels slightly 'soapy' or waxy to the touch compared to quartz. Common locations include Mexico, Brazil, and the USA.